<template>
  <div class="login-container">
    <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on" label-position="left">

      <div class="title-container">
        <h3 class="title">后台管理系统</h3>
      </div>
      

      <el-form-item prop="username">
        <el-input
          ref="username"
          v-model="loginForm.username"
          placeholder="用户名"
          name="username"
          type="text"
          tabindex="1"
          auto-complete="on"
          prefix-icon="el-icon-user"
        />
      </el-form-item>

      <el-form-item prop="password">
        <el-input
          :key="passwordType"
          ref="password"
          v-model="loginForm.password"
          :type="passwordType"
          placeholder="密码"
          name="password"
          tabindex="2"
          auto-complete="on"
          @keyup.enter.native="handleLogin"   
          prefix-icon="el-icon-help"
          show-password
        />
      </el-form-item>

      <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;" @click.native.prevent="handleLogin">登 录</el-button>

    </el-form>
  </div>
</template>

<script>
import { Message } from 'element-ui'
import '../../mock'
import 'js-cookie'

export default {
  name: 'Login',
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!value) {
        callback(new Error('请输入正确的用户名'))
      } else {
        callback()
      }
    }
    const validatePassword = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error('密码不能少于6位'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: '',
        password: ''
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePassword }]
      },
      loading: false,
      passwordType: 'password',
    }
  },
  methods: {
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          const data = {
            username: this.loginForm.username.trim(), 
            password: this.loginForm.password 
          }
          this.$http.post('user/login', data).then(res => {
            const info = res.data
            if (info.code !== 20000) {
              Message({
                message: info.message || 'Error',
                type: 'error',
                duration: 5 * 1000
              })
              this.loading = false
            }else{
              const token = info.data.token
              this.$store.commit("SET_TOKEN",token);
              this.$router.replace('/sys')
              this.loading = false
            }
            }).catch(() => {this.loading = false})
        } else {
          console.log('error submit!!')
          return false
        }
      })
    }
  }
}
</script>

<style>
  .login-form {
    position: relative;
    width: 520px;
    max-width: 100%;
    padding: 35px 50px 10px;
    margin: 0 auto;
    overflow: hidden;
    background-color: #283442;
    border-radius: 8px;
    opacity: 0.9;
  }
  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #000000;
  }
  .login-container {
    min-height: 100%;
    width: 100%;
    background-color: #2d3a4b;
    overflow: hidden;

    background-image: url('../assets/bg.png');
    background-size: 100%;

    display: flex;
    align-items: center;
  }
  .title-container {
    position: relative;
  }
  .title {
    font-size: 26px;
    color: #eee;
    margin: 0px auto 40px auto;
    text-align: center;
    font-weight: bold;
  }
</style>
